Thursday, 25 April, 2019
Tomohiro Fujita, Ruth Durrer

We discuss a model which can generate scale-invariant helical magnetic fields on large scales (\lesssim 1Mpc) in the primordial universe. It is also shown that the electric conductivity becomes...

Wednesday, 24 April, 2019
Marco Meineri, Joao Penedones, Antonin Rousset

We set up a scattering experiment of matter against an impurity which separates two generic one-dimensional critical quantum systems. We compute the flux of reflected and transmitted energy,...

Monday, 22 April, 2019
Kai Jiang, Tudor S. Ratiu, Nguyen Tien Zung

In this paper we prove the existence of a simultaneous local normalization for couples (X,\mathcal{G}), where X is a vector field which vanishes at a point and \mathcal{G} is a singular...

Friday, 19 April, 2019
Dmitry Chelkak, Clément Hongler, Rémy Mahfouf

We discuss the magnetization M_m in the m-th column of the zig-zag layered 2D Ising model on a half-plane using Kadanoff-Ceva fermions and orthogonal polynomials techniques. Our main result...

Sunday, 14 April, 2019
Anton Alekseev, Elizaveta Arzhakova, Daria Smirnova

The celebrated result by Biane-Bougerol-O'Connell relates Duistermaat-Heckman (DH) measures for coadjoint orbits of a compact Lie group G with the multi-dimensional Pitman transform of the...

Friday, 12 April, 2019
Seung-Joo Lee, Wolfgang Lerche, Timo Weigand

We systematically analyse weak coupling limits for 2-form tensor fields in the presence of gravity. Such limits are significant for testing various versions of the Weak Gravity and Swampland...

Tuesday, 2 April, 2019
Lorenz Eberhardt, Matthias R. Gaberdiel

String theory on {\rm AdS}_3 \times {\rm S}^3 \times {\rm S}^3 \times {\rm S}^1 with pure NS-NS flux and minimal flux through one of the two {\rm S}^3's is studied from a world-sheet perspective...

Thursday, 28 March, 2019
Anna Beliakova, Hatthew Hogancamp, Krzysztof Karol Putyra, Stephan Martin Wehrli

We construct an explicit equivalence between the (bi)category of gl(2) webs and foams and the Bar-Natan (bi)category of Temperley-Lieb diagrams and cobordisms. With this equivalence we can fix...

Monday, 25 March, 2019
Nikolay Gromov, Amit Sever

We present the first-principle derivation of a weak-strong duality between the fishnet theory in four dimensions and a discretised string-like model living in five dimensions. At strong coupling...

Thursday, 21 March, 2019
Michele Maggiore, B.S. Sathyaprakash, Enis Belgacem, Stefano Foffa , Daniele Bertacca & al.

This Astro-2020 White Paper deals with what we might learn from future gravitational wave observations about the early universe phase transitions and their energy scales, primordial black holes...

Thursday, 21 March, 2019
Dragos Oprea, Rahul Pandharipande

We compute tautological integrals over Quot schemes on curves and surfaces. After obtaining several explicit formulas over Quot schemes of dimension 0 quotients on curves (and finding a new...

Saturday, 16 March, 2019
Abraham Berman, Franziska Borer, Norbert Hungerbühler

We model the Lights Out game on general simple graphs in the framework of linear algebra over the field \mathbb F_2. Based upon a version of the Fredholm alternative, we introduce a separating...